C++ VTK实例之高斯随机数的生成

VTK实例高斯随机数的生成

以下例子演示了从一个平均数是0.0和标准偏差是2.2的高斯分布中随机生成3个随机数。

先创建两个文件：GaussianRandomNumber.cpp和CMakeLists.txt。

代码如下：

GaussianRandomNumber.cxx

#include <vtkBoxMuellerRandomSequence.h>
#include <vtkNew.h>

int main(int, char*[])
{
// The number of random numbers we wish to produce
unsigned int numRand = 3;

vtkNew<vtkBoxMuellerRandomSequence> randomSequence;

// Generate numRand random numbers from a Gaussian distribution with mean 0.0
// and standard deviation 2.2
auto mean = 0.0;
auto standardDeviation = 2.2;
for (unsigned int i = 0; i < numRand; i++)
{
  auto a = randomSequence->GetScaledValue(mean, standardDeviation);
  randomSequence->Next();
  std::cout << a << std::endl;
}

return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

project(GaussianRandomNumber)

find_package(VTK COMPONENTS 
vtkCommonCore
QUIET
)

if (NOT VTK_FOUND)
message("Skipping GaussianRandomNumber: ${VTK_NOT_FOUND_MESSAGE}")
return ()
endif()
message (STATUS "VTK_VERSION: ${VTK_VERSION}")
if (VTK_VERSION VERSION_LESS "8.90.0")
# old system
include(${VTK_USE_FILE})
add_executable(GaussianRandomNumber MACOSX_BUNDLE GaussianRandomNumber.cxx )
target_link_libraries(GaussianRandomNumber PRIVATE ${VTK_LIBRARIES})
else ()
# include all components
add_executable(GaussianRandomNumber MACOSX_BUNDLE GaussianRandomNumber.cxx )
target_link_libraries(GaussianRandomNumber PRIVATE ${VTK_LIBRARIES})
# vtk_module_autoinit is needed
vtk_module_autoinit(
  TARGETS GaussianRandomNumber
  MODULES ${VTK_LIBRARIES}
  )
endif ()

编译

将以上两个文件放在自定义文件夹里，再新建一个build目录，用于存放编译后生成的文件。打开CMake程序，编译设置界面如下：

C++ VTK实例之高斯随机数的生成